some info
Two tag serial numbers where only detected once: 1293296 and 1293301, and where thus omitted.
Females had a mean TL of 85.84 cm (\(\pm\) 10.26, n = 19), and males had a mean TL of 77.64 cm (\(\pm\) 3.75, n = 11).
Last time, we wanted to resolve further how detections might differ between sex and season.
I first divided the year into summer (from 1st of April to 30th of September) and winter (rest). During the winter period, however, there was not a single detection. So I then divided the detections by month.
Detections range from April to October.
Overall, 14 females were detected 10655 times and 4 males were detected 285 times.
I divided the study area into 3 parts: WS1 (the first array in the Westerscheldt), WS2 (the second, more east array in the Westerscheldt) and BPNS.
Within the BPNS, I grouped receivers more than 20 km away from the coast into offshore receivers and the ones closer than 20 km into coast receivers (analogous to Jolien Goossen’s Master Thesis).
maps
The circle size corresponds to the number of detections from each station each month. It is relative to the total number of detections.
The red circles are detections of females, the blue circles are detections of males.
I got salinity data from the ScheldeMonitor. They only reach until Vlissingen, unfortunately. So it roughly is the WS2 area. Below you see salinity averages. For some reason, there are no data for January, Febuary and March.
The circle size corresponds to the number of individuals detected at a station each month. It is relative to the total number of detected individuals.
The red circles are detections of females, the blue circles are detections of males.